[4.05] On Supernova Type Ia Iron Enrichment in Clusters.

R.A. Dupke, R.E. White III (U. of Alabama), K.A. Arnaud (NASA/GSFC)

We present the results of spatially resolved ASCA spectral
analysis of A496, A2199, A3571 and Perseus. Mild, but
significant, central abundance enhancements are found in
each. The analysis of an ensemble of individual elemental
abundance ratio indicates that \gtrsim 50% of the
intracluster iron near the centers of these clusters is from
Type Ia supernovae. Based on the analysis of abundance
ratios in these clusters, we provide constraints on
competing SN Ia explosion models. In particular, the
observed Ni/Fe ratios are consistent with SN Ia explosion
models with fast flame speeds, such as W7, but not
consistent with delayed detonation models. We argue that
resonant scattering of the FeK\alpha line is not required
to explain the observed (NiK\alpha+FeK\beta)/FeK\alpha
ratios.

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